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*rcu-nocbs* no longer missing from kernel boot parameters
Previously, the *rcu_nocbs* kernel parameter was not set in the `realtime-virtual-host` and `realtime-virtual-guest` tuned profiles. With this update, *rcu-nocbs* is set as expected.
Description of problem:
tuned realtime-virtual-{host|guest] have rcu_nocbs missing from boot/kernel parameters
Version-Release number of selected component (if applicable):
How reproducible:
Steps to Reproduce:
1. Activate either realtime-virtual-host or realtime-virtual-guest profiles
2. Reboot
3. cat /proc/cmdline
Actual results:
rcu_nocbs=$isolated_cores is missing
Expected results:
rcu_nocbs=$isolated_cores is included
Additional info:
/usr/lib/tuned/realtime/tuned.conf needs to be updated to include:
cmdline=isolcpus=${isolated_cores} nohz_full=${isolated_cores} rcu_nocbs=${isolated_cores} intel_pstate=disable nosoftlockup
Comment 4Jaroslav Škarvada
2016-06-15 14:04:02 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2016-2479.html
Description of problem: tuned realtime-virtual-{host|guest] have rcu_nocbs missing from boot/kernel parameters Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. Activate either realtime-virtual-host or realtime-virtual-guest profiles 2. Reboot 3. cat /proc/cmdline Actual results: rcu_nocbs=$isolated_cores is missing Expected results: rcu_nocbs=$isolated_cores is included Additional info: /usr/lib/tuned/realtime/tuned.conf needs to be updated to include: cmdline=isolcpus=${isolated_cores} nohz_full=${isolated_cores} rcu_nocbs=${isolated_cores} intel_pstate=disable nosoftlockup